Instant Sandboxes. Zero Config.

Send us code → get a live URL. No templates, no cold installs, no broken dependencies. Just self-healing sandboxes that start warm and execute instantly.

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Benchify SDK

Code → Live URL

// Your LLM generates files

const files = [

{ path: 'App.tsx', content: '...' },

{ path: 'package.json', content: '...' }

]

const sandbox = await benchify.create(files)

Ready in ~2 seconds

sandbox.url =

"https://abc123.benchify.app"

✓ Auto framework detection

✓ Pre-cached dependencies

✓ Self-healing containers

✓ Instant execution

The Sandbox Bottleneck

AI-generated code breaks traditional sandbox assumptions. Users wait through slow code execution, hit errors, and developers get stuck rebuilding infrastructure.

Slow Execution

Cold boot ≠ time-to-execution. Providers optimize VM spin-up, not the part that actually hurts: installing packages, building code, running it. What takes 2 seconds to boot takes 60 seconds to execute.

abc123.sandbox.benchify.com

Setting up your app...

This may take a few minutes

Starting container...

Installing dependencies...

Building application...

Brittle Templates

You build templates so generated code can run — until one package, import, or prompt version drifts. Then everything breaks and you're back in config hell.

def456.sandbox.com

Application Error

Module not found: Can't resolve '@/hooks/useAuth'

Error in ./src/components/LoginForm.tsx

Line 3:24

> import { useAuth } from '@/hooks/useAuth'

Painful Developer Experience

Each prompt tweak forces a template rebuild, which can take hours and multiple PRs.

Docker Build

building template...

[1/8] FROM node:18-alpine

[2/8] COPY package*.json ./

[3/8] RUN npm ci --only=production

[4/8] COPY . .

[5/8] RUN npm run build

[6/8] EXPOSE 3000

[7/8] CMD ["npm", "start"]

[8/8] COPY --from=builder /app/build ./build

Installing dependencies...127/240

Skip the Wait. Start Warm.

We solve dependency resolution, builds, and repairs before your container even starts. Code arrives ready to execute, not ready to install.

No Templates. Pure Inference.

We analyze your code's imports, file structure, and dependencies to infer the optimal runtime environment. Works with any project pattern, any framework, any structure.

Code Analysis Pipeline

Generated Code

React + TypeScript

import React from "react"

React 18 + TS + Vite

Next.js API

export default function handler

Next.js 14 + API Routes

Express + Prisma

import { PrismaClient }

Node.js + Express + DB

Runtime Configuration

Automatic build commands, dependency resolution, environment setup

Dependency Resolution

Popular Packages

react

npm install4-8s

Benchifycached

99.8%

lodash

npm install2-5s

Benchifycached

99.9%

@types/node

npm install3-6s

Benchifycached

99.7%

axios

npm install2-4s

Benchifycached

98.9%

tailwindcss

npm install8-15s

Benchifycached

97.2%

Global cache across all projects • Zero network I/O for popular packages

Pre-Cached Dependencies

Popular packages are resolved against a global cache that spans all projects. Most dependencies are already cached, making them available instantly instead of waiting for npm install.

Warm Start Architecture

Containers boot with pre-cached layers, optimized runtimes, and runtime-ready file structures. No cold installs, no build compilation, just execution.

Container Lifecycle

Cold Container

OS boot + runtime init2-5s

Install Node.js/npm5-10s

Download dependencies20-60s

Build/compile10-30s

Application start2-5s

Total: 39-110s

Warm Container

Container boot (pre-cached)1-2s

Write optimized files0.2s

Execute pre-built code0.1s

Total: 1-3s

30-90× Improvement

Cold boot only • All overhead moved to pre-processing

Static Analysis & Repair

Auto-Fixed Issues

Missing dependenciesAuto-detected & added

import axios → package.json updated

Version mismatchesCompatibility transform

React 18 syntax → React 17 compatible

Stray diff markersRemoved automatically

<<<< HEAD removed from code

Import path errorsPath resolution

../utils → resolved to actual file

Self-Healing Code

Before execution, we run fast static analysis to fix common LLM generation errors. Broken code becomes working code — no expensive LLM callbacks required.

Two Steps. Done.

Dump files into SDK call, get back a working sandbox link. That's it.

Send Your Files

Simple SDK call with your generated code

Take any LLM-generated code files and pass them to our SDK. No matter the framework, structure, or complexity — we'll figure out how to run it.

React

Components, hooks, TSX

Node.js

APIs, servers, workers

Next.js

Full-stack apps

Vue

SFCs, composition

sandbox.js

import { Sandbox } from '@benchify'

const files = [

{ path: "App.tsx", content: "..." },

{ path: "main.js", content: "..." },

{ path: "package.json", content: "..." }

]

const sandbox = await benchify.create(files)

Get Live URL

Instant sandbox with zero configuration

Receive a live URL where your code is already running. We handle dependency resolution, builds, and deployment automatically in the background.

Zero npm install time

Zero build configuration

Zero deployment setup

Response

Live

sandbox.url

https://abc123.sandbox.benchify.com

Deploy time

Config files

∞

Frameworks

Stop Waiting. Start Building.

Join developers who've eliminated the sandbox bottleneck. Turn any AI-generated code into a live URL in seconds, not minutes.

Start Free Watch Demo